Originally Posted by David_Walter
When I go to the "ballistic" app, and select for "best flatness" for the 223 and the 6.5 Grendel, I get the 55 grain Hornady VMAX Superperformance and the 100 grain Wolf FMJ-BT.

Trajectory seems to be similar out to 600 yards, but the Grendel has 818ft-lbs energy at 600 while the 223 has just 306 ft-lbs.

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For any "serious LR" shooting with the 5.56 / 223, a 77 gr bullet would make more sense than using a 53 gr for any kind of analysis.

To the OP: Just depends on your objectives & what you consider LR..............

A lot can be accomplished with a 223 Wylde chambered gun & good 69 & 77 grain bullets at mag length, which are easily purchased & readily available (for now) or hand-loaded.

Or if you want to step it up, the the 224 Valkyrie might be your huckleberry on a small frame.

MM